Oil-gas cooking-stove.



0. E. V. ERIGSGN.

OIL GAS COOKING STOVB. APPLIQATION P'ILBD 11.113,15, 1909.

Patented Nov. 2, 1909.

o all whom it may concern:

Be it known that I, OLor EMIL VICTOR nIosoN, a citizen of Sweden, residing at ,lrottenborg, in the Kingdom of Sweden, have nvented new and useful Improvements in il-Gas Cooking-Stoves, of which the folowing is a specification.

This invention relates to improvements in il gas cooking stoves and the object thereof to remove a great many of the inconvenences of such stoves hitherto used. One of lheir faults is their considerable vertical ieight which make them unsafe and easy to urn over; others are the short lasting of the urners on account of the impurities accuiulating in their channels, the difiiculty of leaning same and the disturbing roar when urning. The inconvenience first mentioned epends on the unsuitable position of the urner at the top of a vertical tube on the il reservoir, the base of the stove thus being ather small in relation to its height. I am ware, that in some oil stoves the burner is laced at the side of the reservoir, but these iave yet other faults depending on the unvrs, these being placed below the top of the oil reservoir, so that the oil pipe and the vaporizer, even while the stove is out of use, are filled with oil, which fumes when the flame is lighted or extinguished. remove the said faults by my invention in giving the burner the smallest possible vertical height and placing it level with or close to the highest point of the oil reservoir. There being several burners each of these is placed in connection with its proper reservoir. I make the volume of the burner head rather large in relation to the cross section of the pipe for the petrol and construct same as a horizontal closed ring, the upper side of which is perforated by radial. slits and I connect the burner with a preferably ring-shaped vaporizer. The mixing chamber is bent and placed immediately under the burner head, and provided at the underside with holes for outlet of such unvaporized oil as may enter the chamber.

Hy invention is shown in the accompanying drawing, wherein Figure l is a front view of the cooking stove, Fig. 2 a plan view of same, Fig. 3 is a. vertical section of the burner on the line A-B in Fig. 5, Fig. 4L a horizontal section of same on the line C-D of Fig. 3, Fig. 5

Specification of Letters Patent.

uitablc arrangementand form of the burn- I fullyv UNITED STATES PATENT OFFICE.

OLOE` EMIL VICTOR ERICSON, OF GOT'IENBORG, SWEDEN.

OIL-GAS COOKING-STOVE.

Patented Nov. 2, 1909.

Application led April 15, 1909. Serial No. 489,997.

is a plan view of the burner shown in Fig. 3. Fig. 6 is a sectional. View showing a modification hereinafter referred to in detail.

The oil stove is provided with one or more oil reservoirs l, which preferably consist of horizontal cylinders in order to obtain the smallest possible height. The reservoirs Yl are adapted to be charged in any approved manner with air under pressure, but the means for so charging the reservoirs forms no part of my invention, and I have therefore deemed it unnecessary to illustrate the same.

The plate or grid 2 for the cooking utensils is placed immediately above the reservoir or reservoirs. Each one of the reservoirs has its proper burner 3, placed at its side under the grid 2, on a level with the top of the reservoir or close to said level. The burner is constructed as ldescribed in the following. The narrow pipe 4C through which the oil is conducted to the burner, extends from the bottom of the reservoir and is preferably led through its higher part, from where it ascends, slightly inclined, to the burner head, at the middle of which it is expanded to a rather low, preferably ringshaped vaporizer. Fro-m the underside of the vaporizer a pipe 6 extends to a height somewhat over the bottom of the vaporizer in orderto prevent non-vaporized oil entering the pipe and reaching the burner. The pipe 6 is connected with the mixing chamber 7, which is placed immediately beneath the burner head, through a short orifice 8 with a narrow opening. In escaping through the orifice S the oilgas is mixed with air which flows into the tubeshaped mixing chamber through one or more openings 9 in the walls of same. The mixing chamberr is preferably bent in a circle, the ends of which do not meet and which opens at the end opposite to the orifice through a vertical channel 10 into the horizontal closed ringshaped burnerhead 1'1. At its top-side the burner-head is perforated by several radial slits l2, through which the combustible mixture of air and oil vapor escapes. For the purpose of easy cleaning of the burner-head this is divided into two parts, which can be separated when desired. Immediately beneath the vaporizer 5 I can place a cup 5d for spirits for heating the same as already known, but a common spiritlamp or the like may also be used for the same purpose. Through an opening 13 at the bottom of the mixing chamber suchV non-vaporized oil, as escapes into the mixing chamber during the ignition may be collected in a cup, for example the above mentioned spirit cup 5d, where it burns together with the spirit instead of being wasted on the table or the floor as hitherto has been the case.

The narrow outlet of the orifice 8 may be cleaned by a needle 14C, which preferably is somewhat conical in order to serve for a valve and to throttle the entrance for the oilgas, when inserted to a certain degree into the outlet. For this purpose the rod 15, at the end of which the needle is placed, is screwed through a tight tting stuiiing box 16 or the like. The needle must be so arranged that it does not fully stop the outlet,

thus allowing the flame to burn during the cleaning also. In order to prevent leakage the cleaning needle may be fixed at right angles to the interior side of a corrugated metal diaphragm 17 placed before the oriiice the periphery of which diaphragm is tightly fitted to or pressed against the gas-tight walls of a chamber placed outside the orilice asshown in Fig. 6. By means of a screw 18, screwed through a fixed nut and pressed against the outside of the diaphragm I can bend this inward and thus insert the needle into the orifice to the desired degree to regulate the iiame. For simply cleaning the needle is pressed by the lingers by means of a rod 19, inserted through a channel in the screw, which rod provided with a button or the like extends outside the screw.

On account of the burner extending chieiiy in a horizontal direction it has become possible to reduce its height as well as that of the whole stove, the total height being still further reduced by placing the burners at the side of the reservoirs instead of on their top. The said arrangement gives the stove a rather large base in relation to its height and consequently makes it rest rmly.

In the described ring-shaped mixing chamber 7 the liow of the gas is forced to change direction thus getting better mixed with the air, and owing to its proximity to the burner head the chamber becomes well heated, so that the gas is cooled as little as possible on its way to the burner. In the large-volumed burner-head the gas has an opportunity to expand thus escaping very slowly through the slits in the burner, giving a steady iiame without the disturbing roar usual with petrol-stoves of hitherto known types. On account of the reduced vertical height of the vaporizer the oil will leave this and flow back to the reservoir, as soon as the air-pressure in the latter is released so that it is not necessary for this purpose to place the va orizer very high.

Having thus describe my invention, what l I claim as new and desire to secure by Iletters Patent is 1. In an oil-gas cooking stove, the combination of an oil reservoir, a burner comprising a tubular, ring-shaped burner head having eduction openings in its upper portion, and arranged in about the same horizontal plane as the reservoir, a ring-shaped vaporizer disposed above and adjacent said head, a conduit intermediate the reservoir and the vaporizer, and a ring-shaped mixing chamber disposed below and adjacent the burner head and connected therewith and also connected with the vaporizer, and a plate for supporting cooking utensils, connected with the burner.

In an oil-gas cooking stove, a burner` comprising an annular burner head having eduction opening in its upper portion, an annular vaporizer arranged above and adjacent said head and adapted to be connected with a source of hydrocarbon supply, and an annular mixing chamber arranged under and adjacent the head and connected with the vaporizer and also connected with the head.

3. An oil-gas cooking stove comprising oil reservoirs spaced apart, a grid arranged adjacent the reservoirs and in the same horizontal plane as the uppermost portions thereof and adapted to support cooking utensils, and burners carried by the grid and respectively comprising an annular vaporizer connected with the adjacent reservoir, an annular burner head arranged under and adjacent the vaporizer and having eduction openings, and an annular mixing chamber arranged under the head and connectedwith the vaporizer and also with the head.

d. In an oil-gas cooking stove, the combination of one or more oil-reservoirs, and one burner for each reservoir arranged at the side of the reservoir, and comprising a tubular ring-shaped burner-head having eduction openings in its top, a tubular vaporizer for each burner disposed above the head thereof,

and a tubular mixing-chamber under the burner head and connected therewith.

5. In an oil-gas cooking stove, the combination of one or more oil-reservoirs, and one burner for each reservoir, arranged at the side of the corresponding reservoir, a tubular ring-shaped burner-head divided horizontally into two detachable parts and having radial slits at its top, a tubular vaporizer above and adjacent the burner-head, and a tubular bent mixing chamber under and adjacent the burner head and connected therewith.

6. In an oil-gas cooking stove, the combination of one or more oil-reservoirs, one burner for each reservoir, a tubular ringshaped burner-head, a tubular vaporizer above and adjacent the burner head, a tubuar bent miXing chamber under and adjacent he burner head and having a small aperture 11 its under side, and a cup for ignition pirit placed under the burner in position o receive oil from said aperture.

7. In an oil-gas cooking stove, the combiiation of one or more oil-reservoirs, one nii-ner for each reservoir, a tubular vapo- 'izer, a tubular mixing-chamber connected `hrough a small orifice with the Vaporizer 1nd having a chamber surrounding said mall orifice, means for cleaning the small ritice consisting of a pricling needle atached to the end of a spindle, a corrugated netallic diaphragm tightly pressed against he walls of said chamber that surrounds the anall orifice to the inside of which dia- )hragm the said spindle is fixed at right uigles, and a screw threaded through a fixed iut outside said chamber and pressed against Vhe outside of said diaphragm, as described 1nd shown.

S. In an oil-gas cooking stove, the combination of one or more oil-reservoirs, one burner for each reservoir, a tubular Vaporizer, a tubular mixing-chamber connected through a small orifice with the Vaporizer, and means for cleaning said orifice consisting ot a prickinpI needle, a corrugated diaphragm the inside of which is fixed to the needle, a screw pressed against the outside of said diaphragm and having a channel, and a rod inserted through said channel and resting against the diaphragm; said rod eX- tending outside the end of the screw so that it can be manipulated by the fingers, as described and shown.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

OLOF EMIL VICTOR ERICSON.

litnesses ROLF LINDBLOM, H. SDERHOLM. 

